<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>将数组的内部指针指向第一个单元</title>

 </head>
 <body><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.range.html">range</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.rsort.html">rsort</a></div>
 <div class="up"><a href="ref.array.html">数组 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.reset" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">reset</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">reset</span> &mdash; <span class="dc-title">将数组的内部指针指向第一个单元</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.reset-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>reset</strong></span>
    ( <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$array</code></span>
   )</div>

  <p class="para rdfs-comment">
   <span class="function"><strong>reset()</strong></span> 将 <em><code class="parameter">array</code></em>
   的内部指针倒回到第一个单元并返回第一个数组单元的值。
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.reset-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">array</code></em></dt>

     <dd>

      <p class="para">
       输入的数组。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.reset-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回数组第一个单元的值，如果数组为空则返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.reset-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4930">
    <p><strong>Example #1 <span class="function"><strong>reset()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$array&nbsp;</span><span style="color: #007700">=&nbsp;array(</span><span style="color: #DD0000">'step&nbsp;one'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'step&nbsp;two'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'step&nbsp;three'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'step&nbsp;four'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;by&nbsp;default,&nbsp;the&nbsp;pointer&nbsp;is&nbsp;on&nbsp;the&nbsp;first&nbsp;element<br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">current</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;\n"</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;"step&nbsp;one"<br /><br />//&nbsp;skip&nbsp;two&nbsp;steps<br /></span><span style="color: #0000BB">next</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">next</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">current</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;\n"</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;"step&nbsp;three"<br /><br />//&nbsp;reset&nbsp;pointer,&nbsp;start&nbsp;again&nbsp;on&nbsp;step&nbsp;one<br /></span><span style="color: #0000BB">reset</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #0000BB">current</span><span style="color: #007700">(</span><span style="color: #0000BB">$array</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"&lt;br&nbsp;/&gt;\n"</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;"step&nbsp;one"<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-function.reset-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.current.html" class="function" rel="rdfs-seeAlso">current()</a> - 返回数组中的当前单元</span></li>
    <li class="member"><span class="function"><a href="function.each.html" class="function" rel="rdfs-seeAlso">each()</a> - 返回数组中当前的键／值对并将数组指针向前移动一步</span></li>
    <li class="member"><span class="function"><a href="function.end.html" class="function" rel="rdfs-seeAlso">end()</a> - 将数组的内部指针指向最后一个单元</span></li>
    <li class="member"><span class="function"><a href="function.next.html" class="function" rel="rdfs-seeAlso">next()</a> - 将数组中的内部指针向前移动一位</span></li>
    <li class="member"><span class="function"><a href="function.prev.html" class="function" rel="rdfs-seeAlso">prev()</a> - 将数组的内部指针倒回一位</span></li>
   </ul>
  </p>
 </div>

</div><hr /><div class="manualnavbar" style="text-align: center;">
 <div class="prev" style="text-align: left; float: left;"><a href="function.range.html">range</a></div>
 <div class="next" style="text-align: right; float: right;"><a href="function.rsort.html">rsort</a></div>
 <div class="up"><a href="ref.array.html">数组 函数</a></div>
 <div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
